123413440331531 has 12 divisors (see below), whose sum is σ = 145292243011272. Its totient is φ = 104508455492448.

The previous prime is 123413440331497. The next prime is 123413440331537. The reversal of 123413440331531 is 135133044314321.

It is not a de Polignac number, because 123413440331531 - 2²² = 123413436137227 is a prime.

It is a super-2 number, since 2×123413440331531² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123413440331537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15172535930 + ... + 15172544063.

It is an arithmetic number, because the mean of its divisors is an integer number (12107686917606).

Almost surely, 2^{123413440331531} is an apocalyptic number.

123413440331531 is a deficient number, since it is larger than the sum of its proper divisors (21878802679741).

123413440331531 is an equidigital number, since it uses as much as digits as its factorization.

123413440331531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30345080090 (or 30345080083 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 38.

Adding to 123413440331531 its reverse (135133044314321), we get a palindrome (258546484645852).

The spelling of 123413440331531 in words is "one hundred twenty-three trillion, four hundred thirteen billion, four hundred forty million, three hundred thirty-one thousand, five hundred thirty-one".